Home / 15,108.98-20,776.45-13,116.05

Finding the Fourth Proportional to 15,108.98, 20,776.45 and 13,116.05

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Solution

The fourth proportional to 15,108.98, 20,776.45 and 13,116.05 is: 18,035.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.98 : 20,776.45 = 13,116.05 : x
  2. Step 2: Convert to fraction form
    15,108.98/20,776.45 = 13,116.05/x
  3. Step 3: Cross multiply
    15,108.98x = 20,776.45 × 13,116.05
  4. Step 4: Simplify right side
    15,108.98x = 272,504,957.02
  5. Step 5: Solve for x
    x = 272,504,957.02/15,108.98
  6. Step 6: Final answer
    x = 18,035.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.